Stovepipe-lock.



J. RIHOOKER.

STOVEPIPE LOCK.

APPLICATION FILED MAR. 24. 1915.

Patented Mar. 14, 1916.

Inventor I Attorneys Witnesses co-. WASHINGTON, b. c.

J OSEPH" ROBERT HOOKER, 0F GAR'IHAGE, MISSOURI.

L STOVEPIPE-LOCK.

. Specification of Letters Patent. Patented Mar; 14, 1916,

a 'iicatimi'md'maicn24, 1915. .Serial-No. 16,705.

To all whom 2'2. may concern:

Be it known. that Y I, .JOSEPHIROBERT HOOKER, a citizen of the United States, residing at Carthage, inthe county of Jasper and State of hllissourhhaveinvented a new and useful Stovepipe-Lock, of which the following is specification.

The device forming the subject matter of this application is adapted to be employed for preventing relative longitudinal movement between the sections of a stove pipe, and the invention aims to provide a novel form of strip adapted to receive a clamping screw, and to provide novel means whereby the strip may be assembled with the stove pipe sections against longitudinal movement.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings :Figure 1 is an elevation showing a pair of stove pipe sections operatively united by the device forming the subject matter of this application; Fig. 2 is a fragmental longitudinal section; Fig. 3 is a cross section on the line 33 of Fig. 2; Fig. 4 is a fragmental longitudinal section showing a slightly modified form of the invention.

In the drawings there is shown a main pipe section 1 and an auxiliary pipe section 2, the auxiliary section 2 being telescoped inside of the section 1. The section 2 is shown as provided with the usual transverse stop rib 3, adapted to coact with the upper end of the main section 1 but, in practice, sometimes failing to exercise this function, notably when relative longitudinal adjustment between the sections 1 and 2 for the purpose of elongating the pipe-conduit, is necessary. The section 1 is shown as having a seam 4. the numeral 5 indicating a seam in the section 2.

InQthe section. 1, relatively near to the seamAL ,IS formed a, transverse slot or opening 6. i Below the slot 6, the main section 1 isstruck outwardly for a short distance to form an upright pocket 7. I

The invention comprises a strip 9 th thickness. of which is slightly greater than -the'thickness of the constituent material of the section l,in order to afford a firm screw hold. Intermediate its ends, the strip 9 is offset as shown at 10, thereby to dispose the ends 11 and 12 of the strip in different planes. The end12 of the strip 9 is thrust downwardly into the pocket '7 and lies inside of the'main section 1, the end 11 of the strip lying on the outside of the main section 1. A screw 14 passes through the wall of the pocket 7 and may or may not be threaded thereinto. In any event, the screw Further, owing to the construction last above described,'when the end 12 of. the strip 9 is inserted into the pocket 7, the screw receiving openings in the strip and in the pocket portion 7 of the section 1 are lined up to receive the screw 14.

In the modification shown in Fig. 4 of the drawings, the main section appears at 17 and the auxiliary section at 18. The numeral 20 denotesthe screw and the only modification contemplated is that the auxiliary section 18 is provided with an opening 19 through which the-screw 20 passes.

Having thus described the invention, what is claimedis:

1. In a device of the class described, inner and outer pipes having their ends telescoped, the outer pipe being struck outwardly to form a pocket having an open end disposed toward the extremity of the outer pipe but spaced from the extremity of the outer pipe; a strip one end of which is dis posed in the pocket and between the pipes,

the other end of which lies outside of the and a, screw passing through the wall of i other end of which lies outside of the outer pipe, between the open end ofthe pocket and the extremity of the outer pipe to facilitate the manipulation of the strip,the strip being In testimony that I claim the foregoing as my own, I have hereto atfixed my signature in the presence of two Witnesses JOSEPH ROBERT HOOKER.

WVitnesses MILTON CHENOWITI-I, OLAF SHEPHERD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington; D. G. 

